From 4780c09f7a0926674c96c0a40dfeb7469f759c8e Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 3 Jun 2016 12:00:07 +0200 Subject: serial: sh-sci: Add more Serial Port Control/Data Register documentation Improve documentation for the SCIFA/SCIFB Serial Port Control and Data Registers: - State clearly that the RTS and CTS lines are active-low, - Document the bits related to the serial port's SCK, RXD, and TXD pins. Signed-off-by: Geert Uytterhoeven Reviewed-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sh-sci.h | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'drivers/tty/serial/sh-sci.h') diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h index 85a2b81ba0a8..e7d2bc692a58 100644 --- a/drivers/tty/serial/sh-sci.h +++ b/drivers/tty/serial/sh-sci.h @@ -121,12 +121,18 @@ enum { #define HSCIF_SRE BIT(15) /* Sampling Rate Register Enable */ /* SCPCR (Serial Port Control Register), SCIFA/SCIFB only */ -#define SCPCR_RTSC BIT(4) /* Serial Port RTS Pin / Output Pin */ -#define SCPCR_CTSC BIT(3) /* Serial Port CTS Pin / Input Pin */ +#define SCPCR_RTSC BIT(4) /* Serial Port RTS# Pin / Output Pin */ +#define SCPCR_CTSC BIT(3) /* Serial Port CTS# Pin / Input Pin */ +#define SCPCR_SCKC BIT(2) /* Serial Port SCK Pin / Output Pin */ +#define SCPCR_RXDC BIT(1) /* Serial Port RXD Pin / Input Pin */ +#define SCPCR_TXDC BIT(0) /* Serial Port TXD Pin / Output Pin */ /* SCPDR (Serial Port Data Register), SCIFA/SCIFB only */ -#define SCPDR_RTSD BIT(4) /* Serial Port RTS Output Pin Data */ -#define SCPDR_CTSD BIT(3) /* Serial Port CTS Input Pin Data */ +#define SCPDR_RTSD BIT(4) /* Serial Port RTS# Output Pin Data */ +#define SCPDR_CTSD BIT(3) /* Serial Port CTS# Input Pin Data */ +#define SCPDR_SCKD BIT(2) /* Serial Port SCK Output Pin Data */ +#define SCPDR_RXDD BIT(1) /* Serial Port RXD Input Pin Data */ +#define SCPDR_TXDD BIT(0) /* Serial Port TXD Output Pin Data */ /* * BRG Clock Select Register (Some SCIF and HSCIF) -- cgit v1.2.3